Log-turner.



F. G. HARRINGTON.

LOG TURNER.

APPLICATION FILED SEPT. 15, 1908.

Patented Dee. 21, 1909.

2 SHEETS-SHEET 1.

mmm

' F. G. EARRINGTON.

LOG TURNER.

APPLIUATION FILED sBPT,15,190.

Y 943,875. Patented 11110.21, 1909.

2 SEEE S-SHEBT 2.

O O O O S'Ywc niet FRED G. HARRINGTON, OF HOLLINS, ALABAMA.

LOG-TURNER.

T o all whom fit may concern:

Be it known that I, Finn) G. HARRiNe'roN, a citiL/.en of the UnitedStates, residing at Hollins, in the county of Clay and State of Alabama,have invented new and useful Improvements in Log-Turners, of which thefollowing' is a specification.

This invention relates to log turners, the object of the invention`being to provide a simple mechanical device for turning logs preparatoryto their presentation to the saw, the log turner comprising handoperated means and including friction gearing whereby the nigger bar maybe moved toward the work and allowed to recede therefrom, and alsowhereby the log turning chain may be operated at any desired moment andto the requisite extent to effect the turning of the log preparatory tothe next cut.

lith the above and other objects in view, the nature of which will morefully appear as the description proceeds, the invention consists in thenovel construction, combination and arrangement of parts herein fullydescribed, illustrated and claimed.

In the accompanying drawings, Figure l is an end elevation partly insection of a log turner embodying the present invention. Fig. 2 is avertical longitudinal section through the same. Fig. 3 is a detailvertical section showing a portion of the nigger bar and the nigger armand the lowery sprocket wheel. Fig. et is a side elevation of a portionof one of the log turning chains. Fig. 5 is a detail section showing oneof the eccentrics and its bearing. perspective view of one of thecceentrics. Fig. 7 is a detail perspective view of the lever arrangementfor shifting the friction wheels.

rlhe frame 1 of the log turner may be of any suitable construction tosupport the operative parts of the mechanism hereinafter described. Inthe drawings, said frame work is illustrated as forming a support for asuperimposed runway or series of skids 2 down which the logs travel tothe saw vmill l carriage designated at 3, the latter heilig ot the usualconstruction and arrangement.

11 designates the main driving shaft which is mounted in bearingssupported on the frame, said shaft being provided with a driving beltpulley 5 and being further provided with a friction drive wheel G, theface of which is composed of any suitable material such as paper, thefriction wheel being Specification of Letters Patent.

Application filed September 15, 1908.

Fig. 6 is a detail f Patented Dec. ,21, 1909.

Serial No. 453,140.

adapted to coperate with other friction wheels 7 and S mountedrespectively on the shafts 9 and 10 parallel to each other and to themain drive shaft 4 as indicated-in Figs. 1 and 2. The friction wheel 7constitutes the chain operating wheel., while the friction wheel 10constitutes the nigger bar operating wheel, both of said wheels 9 and 10being provided with broad faces adapted to coperate with the frictionface of the drive wheel 0r pulley (3. The shafts 9 and 10 are so mountedas to be capable of a slight lateral shifting movement for the purposeof enabling the wheels 7 and 8 to be independently moved toward and awayfrom the drive wheel G. In carrying out this part of the invention eachof said shafts 9 and 10 is jonrnaled in an eccentric 11 best illustratedin Figs. 5 and 6, which eccentric is journaled in a bearing 12 providedwith a suitable base flange 13 by means of which said bearing is securedto the frame of the machine. The eccentric 11 is provided with aradially extending arm 14C, one side of which is recessed as shown at 15to receive a crank arm or lever, as best shown in Fig. 1, said arm 14being further provided with holes 1G to provide suitable fasteners bymeans of which said crank arm or lever is secured to the extension 14 ofthe eccentric. It will be seen that by turning the eccentric 11, theshaft 9 or 10, as the case may be, is shifted toward and away from theplane of the driving shaft t, which results in moving the respectivefriction wheel 7 or 8 toward and away from the driving friction pulleyor wheel G.

The shaft 9 which is actuated by the wheel T is provided with a crankarm 17 having connected thereto one end of a lilik 1S, the opposite endof which connects to the arln 21S) of the nigger bar 20, which is shownin Fig. 1, as extending vertically, in which position it is in readinessto operate on the log indicated at 21, for the purpose of turning saidlog. lt will be noted that the arm 1S) and the crank arm 1T are bothprovided with a longitudinal series of holes to receive the connectingpivots of the link 18, whereby the throw of the nigger bar mayr beaccurately regulated.

,lhe nigger bar 20 is provided at its lower end with a sprocket wheel 22around which passes a sprocket chain 23, the upper port-ion of whichpasses around an upper sprocket wheel at the upper extremity of llO ` 3lwhich connect respectively with crossed the nigger arm, said uppersprocket wheel being mounted on a shaft 24. The chain 23 is provided atsuitable intervals with pivoted dogs 25 adapted to engage the log in themanner indicated in Fig. l, each of said dogs having the engaging pointthereof normally held outwardly to engage the log by means of gravity.The sprocket wheel 2l which drives the chain 23 is fast on the sameshaft 10 .with the friction wheel 8 above referred to, so that when saidwheel 8 is moved into engagement with the Wheel 6, the chain 23 carriedby the nigger bar is set in motion, the dogs 25 moving upward andengaging the log 2l to effect a partial turning of the same preparatoryto the next cut.

The mechanism for shifting the eccentrics and moving the wheels 7 and 3into driving engagement with the wheel or pulley 6, embodies ahand-operated lever 27, the lower end of which is provided with a ball23 which is adjustable lengthwise of the lever 27 and received in asocket of corresponding shape in a bearing 29, thus enabling the lever27 to be moved in any direction. As seen in Fig. 7, the lever 27 hasconnected therewith a pair of diverging links 30 and levers 32 and 33having a common fulcrum point 3e. The lever 33 is connectedl pivotallyat 35 to a link 3G which is pivotally connected at 37 at its oppositeend to a crank arm 38 which is fastened to the arm or eX- tension let ofthe eccentric in which the shaft l() is journaled. The other lever 32 isprovided with an angular extension 39 pivotally connected at 40 to alink 4l which is in turn pivotally connected at 42 to another crank armt3 fastened to the arm or extension let of the other eccentric in whichthe shaft 9 is journaled. y From the foregoing description, it will! beunderstood that the lever 27 ma bei moved in any direction whatever andby the arrangement of crossed levers 32 and 33 and l their connections,the wheels 7 and 8 may l be shifted individually or simultaneously iinto engagement with the driving pulley or .wheel 6 in order to impartmotion to the nigger bar and the chain carried by the nigger bar. Byreference to Fig. 7 it will be clear that by moving the lever 27 in thedirection of the length of the link 30 or approximately in suchdirection, motion will be imparted to the lever 32 and not to the lever33, while by moving the lever 27 in the direction of the length of thelink 3l motion will be imparted to the lever 33 and not to the lever 32.Furthermore, by moving the lever 27 directly toward the fulcrum 34 oraway from saidfulcrum, mo-

tion will be simultaneously transmitted to both levers 32 and As theselevers 32 and 33 control the shifting of the wheels 7 and S toward andaway from the driving pulley or wheel (3 it will now be understood thatthe wheels 7 and 3 may be shifted separately or both simultaneously withthe result that the nigger bar and the log turning chain 33 may beoperated simultaneously or separately as may be found necessary.

Having thus fully described the invention, what is claimed as new is Alog turner comprising a supporting frame, a nigger bar journaled thereonand movable toward and away from the work. an angle arm or L-shapedextension on said nigger bar, a shaft provided with a crank operativelyconnected by a pivoted link to the arm of the nigger bar for swingingsaid nigger bar toward and away from the work with a positive movement,a log turning chain carried by the nigger bar, a` second shaft fordriving said chain, a main drive shaft, a friction drive wheel fast onthe drive shaft, other friction wheels mounted on the rst named shafts,and hand-corr trolled eccentric connections for effecting a relativeshifting movement and engagement between the friction wheels and thefriction drive wheel on the main drive shaft.

In testimony whereof l affix my signature 1n presence of two witnesses.

FRED G. HARRINGTON.

lVitnesses J. Gr. Co,

Jur STONE.

